"What? No I'm not about to joke about spiders at Marduzi’s expense, once you've seen a wolf spider the size of a bull kill and suck dry a man in less than a minute you stop thinking fear of spiders is humorous."

You see the three spiders each gather a ball of webbing in their front limbs and swiftly cast it at the group. To your dark-adapted eyesight, the webbing seems to glisten with an inky sheen - almost darker than the surrounding blackness.

In the darkness, things move. Iralynash, you feel the faintest brush of something soft and silken, with a faint tingle but no real harm. Malcolm and Ruhk, strong silken strands wrap round you from out of the darkness. You are snared, and the strands burn with an evil icy chill.

Malcolm and Ruhk are entangled, and take 1 hit point of negative energy damage each. DC 12 Strength check or Escape Artist check to free yourself. Party's turn - you can make perception/listen rolls to find out where the enemy is, and Halvor can direct.

Since the Perception roll was high, I'll roll an attack for this round.

Kelistra approaches the spot where Ruhk is struggling to free himself and waits for the spider sound to approach him. When she thinks she has a fix on the thing skittering towards its prey, she thrusts her glowing rapier blade to where she thinks its body should be.

OK, partial resolution for this round.
@Malcolm, escaping is a standard action, so you can move and draw your sunrod. However, it's another standard action to strike a sunrod, so that will have to wait until next round.

Malcolm rips his way out of the webbing with ease. Before he can raise a light, Halvor's muttered invocation causes a wave of blinding daylight to spill out from a small coin. The illumination is stark and bright, throwing shadows across the cavern. Three giant spiders rear back, shielding their multiple eyes from the violent beams of light.

Marduzi and Kelistra both miss, despite the sudden bright light.

Rommin's arrow buries itself into a spider, leaving it oozing ichor.

Jordan's fire catches just one spider - the same that Rommin targeted.

Is it possible for me to attack one or more of the spiders with my bombs without hiting Marduzi and Kelistra? If be answer is yes I will toss a bomb trying to get the injured one and maybe one more with the splash. If I can only get one without hurting the others that is what i will do. If i have no clear shoot I will charge the injured one.

No map for this combat I'm afraid. Now that Halvor has resolved the darkness, I don't think things will last long enough to matter.

Marduzi and Malcolm each leave gaping wounds in their chosen targets. The spiders hiss and chitter in verminous rage as they writhe around the cruel steel blades. Rommin's arrow, guided by Halvor's blessing, plunges into a spider's abdomen. Both spiders are clearly critically wounded, but their tiny insectoid minds have no room for fear or flight.

Iralynash misses with what would have been a killing blow from his hammer.

Jordan feels poison winding through his veins from the deep spider bites. Azmythe's healing restores his wounded body, but he still feels unnaturally weak. Jordan, lose 1d2 ⇒ 2 points of strength, and next round make another DC 14 Fort save.

Ruhk bursts free from the deathly webbing before Kelistra reaches him. Kelistra, you can choose another action if you'd like to.

And Kelistra and Jordan between them dispatch the last two spiders. The blackly twitching corpses start to scorch and dissolve in the bright light from Halvor's coin. Within seconds there is nothing but discolored patches of stone showing where the unnatural spiders died.

Jordan continues to feel the after-effects of the spider's poison. Another Fortitude save please Jordan. DC is 14.

Poison that saps the strength of a body, icy nets that burn with unnatural cold, and finally they dissolve upon death.
Whatever those things were, they were NOT natural...I'm afraid my knowledge is useless for telling what they were."